Fixes to GUI config and minimal scene example

[chapulina]

Bug fix

Summary

• Fix feature list
• Remove View Angle from default config
• Remove anchors from invisible plugins, they should be on the top-left corner of the screen anyway
• Reorder plugins on the example

Another thing we need to do is to update all examples to use MinimalScene instead of GzScene. That can come in a separate PR.

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
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[jennuine]

LGTM, do we want all the plugins to be docked_collapsed in minimal_scene.sdf?

[chapulina]

do we want all the plugins to be docked_collapsed in minimal_scene.sdf?

When there are more than 2 docked plugins, I like to collapse them so they look a bit more organized. We may add more there in the future too. But that's very subjective, what do you think?

[jennuine]

I agree :)

[codecov]

Codecov Report

Merging #1051 (aa743f6) into main (f4d47b5) will increase coverage by 0.30%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1051      +/-   ##
==========================================
+ Coverage   63.71%   64.01%   +0.30%     
==========================================
  Files         257      255       -2     
  Lines       20064    19916     -148     
==========================================
- Hits        12783    12750      -33     
+ Misses       7281     7166     -115     

Impacted Files	Coverage Δ
src/EntityComponentManager.cc	84.95% <0.00%> (-0.15%)	⬇️
src/gui/plugins/view_angle/ViewAngle.cc
src/gui/plugins/view_angle/ViewAngle.hh

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